Method for power control of heating power of mains operated household appliances, involves controlling power per cycle at different levels, where quick or imprecise control takes place in lower level

摘要

The method involves controlling the power per cycle at different levels, where a quick or imprecise control takes place in a lower level, and a slow or fine graded control takes place in an upper level. Pulse packets are assembled from grid half cycles to a block (B) in the lower level, where the pulse packets are assembled to each block.